Oceanside, California is 72% larger than Pompano Beach, Florida.
Area: 108 km2 calculated
Oceanside is a coastal city located on California's South Coast. It is the third-largest city in San Diego County, California. The city had a population of 183,095 at the 2010 census. Together with Carlsbad and Vista, it forms a tri-city area. Wikipedia
Area: 63 km2 calculated
Pompano Beach is a city in Broward County, Florida, United States, along the coast of the Atlantic Ocean just to the north of Fort Lauderdale. The nearby Hillsboro Inlet forms part of the Atlantic Intracoastal Waterway. Wikipedia